RU1827323C - Bottom draining device - Google Patents

Abstract

Usage: the field of ferrous metallurgy, in particular the design of foundry ladles, intended primarily for casting steel. SUMMARY OF THE INVENTION: A device for bottom discharge includes a refractory plug with drain channels located in the bottom lining of a metallurgical vessel, connected to a drive for moving it by a lever. The bottom discharge device is provided with a refractory holder fixed in the lining of the metallurgical tank, a force transducer located in the connection of the lever and the drive for moving the plug, the plug being placed in the ferrule and provided with an opening for installing a thermocouple. To eliminate the breakthrough of the melt (steel), a non-sintered sealing filling (graphite) is used between the mating surfaces of the cage and the plug, and an asbestos gasket is used to interface the metal collar with the refractory ceramic plug. 3 s.p. f-ly, 1 ill. S (L C

Description

FIELD OF THE INVENTION The invention relates to ferrous metallurgy, in particular foundry ladles, primarily intended for steel casting.

The purpose of the invention is to increase the reliability of the device and the convenience of its maintenance.

The drawing shows a device, a longitudinal section (to the left of the vertical axis. The plug is in the closed position, the melt does not leak, and to the right - in the open position, the melt flows through the radial channels along the central one).

1-bottom lining of a metallurgical tank;

2 - refractory holder, fixed in a metallurgical tank on refractory clay;

3- a refractory cylindrical stopper located in a cage with a sliding fit;

4- central and radial channels for draining the melt;

5 - sealing, non-sintered filling filling the cavity 6 in conjunction with the cage. Metallic , Mut G, securing the cork with asbestos gasket 8 and connected to the lever 9. In the lower part of the clamp and cork there is a place for installing the thermocouple 10, and a ceramic sleeve 11 is fixed under the cork in the clamp, eliminating freezing (freezing) on end surface of the tube. An actuator 12 with a rod is mounted on a support 13 attached to a metal case of a metallurgical vessel, a thrust ring 14 is mounted on the actuator rod to adjust the lifting height of the stopper plug and rod head - 15, in the socket of which a force transducer 16 is placed and the clamp lever is fixed. To increase reliability crepe00

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Foam clips in the metallurgical vessel uses a metal plate 17, which is included in the protrusions 18 of the housing of the metal vessel.

The stopper plug 3 with respect to the ferrule 2 and the central vertical axial line has dn extreme positions, on the left side, the plug is shown in the closed position, when the radial and central channels 4 for the melt slip (concrete is molten steel), neper are dug with cylindrical protrusions holders 2, encapsulating cavity b, in which the bulk filler 4 is placed, eliminating the breakthrough of the melt between the shut-off hpr.iVon 3 and refractory ferrule 2, When the plug is in position, metallurgical cfps -. a container (graded ladle) P Zsporifuegs to the melting unit or transfer to the place of difference between the steel (steel) molds, casting molds, continuous casting units (HPC).

The second position of the stopper plug 3 is shown to the right of the central longitudinal axis. The radial channels 5 are raised above the inclined upper surface of the refractory holder 2, the melt from the metallurgical vessel through the radial and central channel 4 enters. metal receiver tg.ry (mold, etc.). The melt draining rate is reluctant (the height of the plug 3 is higher than the conical surface of the refractory cage 9, the plug is moved up and down by the locking mechanism. A stop ring 14 is attached to the actuator 12 to regulate the lifting of the stopper 3. The end of the actuator stem (hydraulic or the evo-cylinder) ends with a trap 15, in which the lever 9 is fixed, with & connected to the clamp 7, B in connection with which there is an i-socket of the head 15 there is a silyshimshlyshchitelny transducer 16, which accepts ferrohydrostatic pressure, arrival Then to the stopper plug 3 through the lever 9, the scheme of operation and its device are described in the patent and scientific literature, a specific example is a gastronomic electronic balance.

The asbestos gasket 8, laid between the retaining test 3 and the metal clamp 7, softens the crimp of the plug, eliminates the breakthrough of the melt through microcracks, together with the sealing non-sintering backfill 5, ensuring the reliability of the proposed device. The thermocouple is located in the lower part 1 of the stopper plug 3, its principle of operation and use are well known.

Ceramic conical sleeve 11, a large base fixed in the clamp 7, eliminates the freezing of the melt at the end of the stopper tube 3. The sleeve 11 reflects

the heat of the metal at the end of the plug, and the outgoing gases from the melt prevent the penetration of atmospheric air to the end surface of the stopper plug 3.

The preparation of stopper plug 3 and ferrule 2 for the next melting can be done in the drift span, without highlighting special sections, in the case of the preparation of stoppers and slide gates. Preparation is made in pairs with individual

lapping, the use of graphite lubricant and unsintered filling (graphite, coke, staurolite concentrate, etc.) are used in the preparation of slide gates.

in comparison with the prototype, in which a narrow range of application of the device is solved - only melt drain from a cold crucible with low reliability and known technical solutions for

casting of melts (steel) stop casting and gate steel casting, the proposed technical solution has several advantages.

Thanks to the use of locking

cork and its design, it is possible to simultaneously cast the melt, control the flow and dosing of the mass of the melt and the temperature of the melt, which increases the convenience

work of staff. Compared with the most advanced and most common steel casting method, the proposed technical solution uses half as much refractory products, their manufacture and processing are simplified. The locking mechanism is simplified and its cost is reduced.

In the manufacture of stopper plugs and

heat-resistant and wear-resistant inserts are allowed in places of increased wear.

In comparison with the known technical solutions described in the patent and

scientific and technical literature, the proposed solution has novelty and has a positive economic effect.

Claims (4)

SUMMARY OF THE INVENTION 1. A device for bottom discharge, comprising a refractory plug with drain channels located in the bottom lining of a metallurgical vessel, connected to the drive of its movement by means of a lever, characterized in that, In order to increase reliability in operation and ease of maintenance, it is equipped with a refractory holder fixed in the lining of the metallurgical tank, a force transducer located in the connection of the lever and the drive for moving the plug, the plug is placed in the refractory holder and made with an opening for a thermocouple. 2. Device pop. 1, characterized in that in conjunction with the cage clip 0 a cavity filled with non-sintering filling is made. 3. Device pop. 1, characterized in that it is equipped with a clamp mounted on the cork and rigidly connected with a lever and asbestos gasket located between the clamp and cork. 4. The device according to claim 1, with the exception that it is equipped with a conical ceramic sleeve with a large base fixed to the clamp. 4 561